Wikimedi'Òc

ClarksForkoftheYellowstone-1922.jpg - Mike Cline

Clinker outcrop (Wasatch Formation, Lower Eocene; coal fire metamorphism at 19 ka, Late Pleistocene; Interstate 90 west-bound hilltop rest area, east of Buffalo, Powder River Basin, Wyoming, USA) 4 (20122259562).jpg - Ser Amantio di Nicolao

Clinker (Wasatch Formation, Lower Eocene; coal fire metamorphism at 19 ka, Late Pleistocene; large block at Interstate 90 west-bound hilltop rest area, east of Buffalo, Powder River Basin, Wyoming, USA) 3 (19942515530).jpg - Ser Amantio di Nicolao

Clinker (Wasatch Formation, Lower Eocene; coal fire metamorphism at 19 ka, Late Pleistocene; large block at Interstate 90 west-bound hilltop rest area, east of Buffalo, Powder River Basin, Wyoming, USA) 2 (19509574613).jpg - Ser Amantio di Nicolao

Pleistocene glacial erratic (Inspiration Point Drive, Yellowstone, Wyoming, USA).jpg - Ser Amantio di Nicolao